Danish Museum of Science and Technology

Run by the University of Copenhagen, with touch pools and tanks holding the sea life of the Øresund.

Built below sea level inside the walls of an old dry dock, with a children's area called the Dream Ship.

Hamlet's castle, with cannon batteries facing Sweden across the narrow strait and Holger the Dane in the cellars deep below.

A sculpture park above the Sound with works by Calder and Henry Moore, and a children's wing of its own.

Three floors of free open workshops where kids 4 to 16 paint, draw and build, taking their ideas from the art in the galleries.

A Renaissance castle built across three islets in a lake, with an ornate chapel, the Great Hall and a formal Baroque garden beside it.